Integral reinforced-concrete roof structure.



S. RECHNIEWSKI. INTEGRAL REINFORGED CONCRETE ROOF STRUCTURE.

APPLICATION FILED MAY 14, 1910.

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APPLICATION FILED MAY 14, 1910.

Patented May 27, 1913.

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STANISLAW RECHNIEWSKI, OF ST. PETERSBURG, RUSSIA.

INTEGRAL REINFORCED-CONCRETE ROOF STRUCTURE.

Specification of Letters Patent.

Patented May 27, 1913.

Application filed May 14, 1910. Serial No. 561,342.

To all whom it may concern:

Be it known that I, STANISLAW RECH- xmwsnr, engineer, a subject of theCzar of Russia, of 19 Tavritcheskaya street, St. Petersbur Russia, haveinvented new and useful Improvements in Integral Reinforced-ConcreteRoof Structures, of which the following is a specification.

My invention relates to reinforced concrete roof construction in which aplurality of hollow spanning members of concavoconvex cross section,suitably supported at ends, are adapted to support intermediate roofmembers, the hollow spanning members being provided, within its concaveportion, with transverse separating members to prevent lateraldeflection due to forces acting thereupon and as a reinforcement to thesides of the spanning members to overcome the compressive directedforces set up by the intermediate roof members.

The object of my invention is to provide an improved means for theconstruct-ion of roof structures where the distance between supports, orspan of such structure is con siderable. I attain this object by theconstruction and arrangement of parts shown in the accompanyingdrawings, in which- Figure l is a cross sectional View through abuilding, taken on the line BB of Fig. 3 and embodying my invention.Fig. 2 is a cross sectional view taken on the line C--C of Fig. 3. Fig.3 is a central vertical sec tion through a building, indicated by theline AA of Fig. 1. Fig. 4 is a fragmentary view in plan of the roofconstruction. Fig. 5 is a cross sectional View taken on the line EE ofFig. 7, and showing a modification of my invention. Fig. 6 is a crosssectional view taken on the line F-F of Fig. 7. Fig. 7 is a sideelevation of a building embodying my invention. Fig. 8 is a centralvertical section taken on the line DD of Fig. 5. Fig. 9 is a fragmentaryplan view of the roof construction.

Similar characters refer to similar parts throughout the several views.

In the drawings, with reference to Figs. 1 to 4: inclusive, itrepresents generally an arched reinforced concrete beam or rib, whichcomprises side members i converging upwardly to an arched member a whichconstitutes the roof of the beam or rib. The. side members are held fromlateral deflection and reinforced against inwardly directed compressiveforces by separating members 8. The beams or ribs h are spaced apart andas shown in the drawings, have end bearings upon walls 2' of a buildingto which they transmit the load of the roof structure. Between the beamsor ribs, and supported thereby, are what I term intermediate reinforcedconcrete spanning members 70, which are preferably reinforced as at 7'and which reinforcement extends transversely through the beams or ribs.The intermediate spanning members are partially supported by beingconfined between the wedging sides of the beams or ribs and in whichposition they act as a wedge therebetween, serving as a wind brace tothe structure.

With reference to Figs. 5 to 9 inclusive, beams or ribs h are adapted toserve as skylights. This is accomplished by providing side members 2?converging at an arched rib a, the side members being apertured as at r,which apertures may be suitably glaZ-ed to exclude the inclementweather. In order to reduce the obstructing of light entering throughthe apertures r, spacing members 8 are reduced in height at theircentral transverse portion as shown in Fig. 8, they serving the samepurpose as members 8 described in connection with Figs. 1 to t. Thesupportance of the members h and intermediate spanning members 70 arealso substantially that as described in connection with the beforementioned figures.

I claim 1. A reinforced concrete roof construction comprising anintegral span of reinforced concrete adapted to rest on side walls andconsisting of slightly arched reinforced concrete portions extendingfrom wall to wall, arched reinforced concrete ribs extending from wallto wall and projecting above said portions and having side or lateralwalls spaced apart from each other and united near their lower marginswith said slightly arched portions, and reinforced concrete separatingmembers transversely disposed between the walls of said arches andformed integral therewith.

2. A reinforced concrete roof construction comprising an integral spanof reinforced concrete adapted to rest on the side walls and consistingof slightly arched reinforced concrete por ions extending from wall towall, arched reinforced concrete ribs extending from wall to wall andprojecting above said portions and having lateral or side walls spacedapart from each other and united near their lower margins with saidslightly arched portions, and vertically disposed flat reinforcedconcrete separating members transversely arranged between the walls ofsaid arches and formed integral therewith.

8. A reinforced concrete roof construction comprising an integral spanof reinforced concrete adapted to rest on side walls and consisting ofslightly arched reinforced concrete portions extending from wall towall, arched reinforced concrete ribs extending from wall to wall andprojecting above said portions and having lateral or side walls spacedapart from each other and united near their lower margins with saidslightly arched portions, and reinforced concrete separating membersdisposed between the walls of said arches and spaced apart from eachother, said separating members being of greater height near the crown ofthe arch than near the base thereof.

4. A reinforced concrete roof construction comprising an integral spanof reinforced concrete adapted to rest on side walls and consisting ofportions slightly arched transversely with respect to the length of thespan, tending substantially from wall to Wall and projecting above saidslightly arched portions, said ribs having side walls convergcreteseparatlng members connecting said side walls, substantially asdescribed.

In testmiony whereof I affix my signature in presence of two witnesses.

STANISLAW RECHNIElVSKI.

\Vitnesses H. A. LOVIAGUINE, N. SKRSZKVOLZ.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

arched reinforced concrete ribs ex-e

